That is the most SELFISH thing
you've ever done.
The Big Bang Theory Season 12, Episode 7
Well, it would be SELFISH of me
to keep it.
The Big Bang Theory Season 10, Episode 10
You're a completely SELFISH human being
and a physical and moral coward.
The Big Bang Theory Season 8, Episode 6
or a SELFISH reason?
The Big Bang Theory Season 12, Episode 20
you did something
totally SELFISH without worrying
The Big Bang Theory Season 12, Episode 20